Porphyra is a general term for algae that are symbiotic in the sea. Rhodophyta, Saussureae. Algae are membranous and called phyllodes. Do you know how to raise laver? The following is the content of the cultivation method of laver compiled by me, I hope you like it!

cultivation method of laver

laver cultivation has a history of more than 3 years, and the production scale of laver is small, and the production links such as seed cultivation, marine cultivation and processing have not formed a relatively perfect industrial chain.

The main manifestations are as follows:

1. The selection of laver vegetables is unscientific, and the vegetables are self-produced, spores are collected and seedlings are autotrophic, and the germplasm is seriously degraded

2. The cultivation technology is backward

3. The laver processing is a weakness and lacks market competitiveness.

By means of modern biotechnology, excellent, high-yield and stress-resistant laver varieties were bred; Establish the operating rules for the cultivation of fine varieties and seedlings and the operating rules for the cultivation of sea areas; Build a complete industrial chain from germplasm breeding, seedling cultivation, sea area cultivation and deep processing, realize the renewal and improvement of laver germplasm, and accelerate the standardization and scale of laver industry.

technical guidance

1. Study on breeding technology of improved varieties of laver: Carry out biotechnology research such as somatic cell cloning and artificial induction of laver, and select varieties with high homozygosity and stable excellent characters.

2. Study on large-scale industrialized seed production technology of good laver seedlings: Study on the cultivation technology of indoor fruiting spore collection, filamentous cultivation and ripening promotion of the selected fine shellfish.

3. Establishment and demonstration of safe and efficient cultivation techniques of laver: According to the cultivation characteristics of laver and the sea conditions in Xiangshan area, a set of safe and efficient new cultivation modes of laver and technical operation procedures for large-scale production and application were established.

4. Study on deep processing technology of laver: develop new technology of deep processing of laver once and twice, and carry out industrial production. Gradually form a relatively complete industrial chain of seedling raising, cultivation and processing. Technical points of cultivating laver

Careful inspection of the seedling supplier

High-quality seedlings are the basis for a good harvest of laver. It is necessary to inspect whether the algae planted in the seedling raising unit came from the healthy breeding sea area in the last production season, whether the germplasm is updated frequently, the growth and development of conch filaments, the occurrence of diseases during seedling raising, etc. If I am not fully familiar with the knowledge of seedling raising, I can invite instructors and professional technicians with practical experience to conduct on-site inspection.

Carefully select the cultivation field

According to the summary of the last production season, the laver cultivation field can't choose the sea area where the water flow is too slow, because the laver grows by the nutrients brought by the seawater flow, and the water flow is too slow to prevent the laver from being malnourished and the growth speed is too slow, and at the same time, it can't choose the sea area where the water flow is too fast to prevent the raft from being washed down. The selected cultivation sea area should conform to the area with flat beach surface, small gradient, seawater velocity of 1cm/s~3cm/s, total nitrogen content of more than 2mg/m3, and Gan Lu in flood season for 4 ~5 hours, so as to ensure the normal growth of laver.

Strengthen the management of seedling net

The hanging of seedling net should avoid the dangerous period of green algae attachment in the sea area, and the seedling net should be covered with water-permeable and breathable cloth curtains and blankets during transportation to prevent rain and sun exposure and keep the net curtain moist. The hanging of the net curtain is selected before the high tide. The net curtain is hung on the raft frame with 3-5 overlapping layers. If the net curtain just hung is away from the high tide for a long time, seawater can be sprayed to keep the net curtain moist. Farmers should carry out patrol management every day, and pay attention not to make the net curtain loose or droop excessively. In the sea area with more floating mud and diatoms or in the small flood season, the net should be washed or dried in time to prevent the seedlings from being bruised or the single spore from attaching.

Real-time monitoring of seawater PH value

PH value is one of the most critical factors affecting seedling emergence. After selecting the cultivation field, all farmers should regularly monitor the PH value of the water in the cultivation area while considering the water flow rate, nutrients, Gan Lu time, etc. It is generally recommended to test it every three days. If the test value exceeds the permitted range of laver growth, it is recommended to re-select a safe cultivation field. The growing environment of laver

Porphyra thallus mostly grows in intertidal zone, which is a sea area with strong wind and waves, smooth tidal current and rich nutrients. Strong dry resistance; The suitable light intensity is 5 ~ 6 lux, which has the characteristics of high light saturation point and low light compensation point and belongs to high-yield crops.

The adaptability to low temperature varies with the water content of the algae. When it is quickly dried to a water content of 2%, it can still regain its vitality after being refrigerated at a low temperature of about -2℃ for several months to one year. The adaptive range of seawater specific gravity is wide, but 1.2 ~ 1.25 is appropriate. Filaments have poor dry resistance and require low light, so they are naturally distributed below the low tide line. When the temperature begins to drop and the sea water flows, the conchospores are often released in large quantities at 9 ~ 11 am every day, showing obvious diurnal periodicity. Distribution of laver

It is distributed in coastal areas.

Porphyra haitanensis is cultivated in the coastal areas of Fujian and southern Zhejiang, while Porphyra yezoensis is mainly cultivated in the north.

Xiapu County, the hometown of laver, is located in the east of Fujian. It is one of the oldest counties in Fujian, and it is also the earliest area where kelp and laver were cultivated in southern China. As early as the Yuan Dynasty, there was a record that Xiapu people cultivated laver. Is the hometown of laver in China, with? Xiapu seaweed? National geographical indications.